數典忘祖

Simplified: 数典忘祖

shǔdiǎnwàngzǔ ㄕㄨˇ ㄉㄧㄢˇ ㄨㄤˋ ㄗㄨˇ

    • to recount history but omit one's ancestors (idiom) to forget one's roots

Character by character

Sources